Machine for splitting of stones or the like



Dec. 6, 1927.

. C. (5. SMITH MACHINE FOR SPLITTING 0F STONES OF THE LIKE Filed-Dec. 3. 1924 I avzN'roai c rl Gusfqf' ATTOR Y Patented Dec. 6, 1927.

UNITED; STATES g 1,651,973 PATENT OFFICE.)

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momma non srtnrme ors'ronns on THE 1.1m. Q

' Application niea December a, 1924,8eria1 110. 753,553, and in Sweden necember 19,1923.v

This invention relates to improvements in stone splitting machines of that type,

which is provided with a hammer arran ed on a spr ng shaft, said shaft being ul- .crumed in, the machine frame. Below the.

hammer there is a massivefoundation frame or block carrying'a steel anvil for supporting the block of stone to be split, 1 'In such a machine considerable diflicul -ties have been experienced in manufacturing the devices appertaining to the shaft, sov as to render them capable of resisting the tremendous shocks the hammer. I

The object of the invention is to obtaina device of the aforesaid kind, in which the shaft is efi'ectually protected against break ing or 'other' damage which might occur from the shocks mentioned above.

A preferred example of the invention 1s shown in the accompanying drawings, in.

which Figure 1' shows a side view, partly in section, of a stone splittingmaehine, Fig. 2. a plan view of the same. Figure 3 shows a section of the head of the hammer onthe line IIIIII, Fig. '1. Figure 4 shows a section on the line IV-IVyFig. 1, ;on' an enlarged scale. Figures 5, 6 and 7 show details. 1

'On the frame 1 of the machine. there is securedf a shaft 2. p A friction sheave 3 is,

mounted for rotation on said shaft and adapted to be frictionally. engaged by a smaller friction sheave 4, secured to a shaft 5. Said shaft is journaled in two movable arms 6, and on one side of sheave 4 there is located a gear wheel 7, fixed on shaft 5 and meshing with a pinion 8, secured to shaft 9'. Shaft 9 is mounted for rotation in bearings on the machine frame, and constitutes the driving shaft of the machine. On shaft 9 there is secured a flywheel 10, which may be used as a driving belt pulley. Wheels 4 and 7 are located between the two movable arms or links 6, which are fulcrumed on shaft 9, andare, by means of link rods 12, connected to a shaft 11, mounted for rotation in the machine frame. The connection between link rods 12 and shaft 11 comprises levers 13, fixed on shaft 11 and pivotally connected to levers 13. A treadle 14 is secured to crumed on shaft 2. Said arm 16 is built up produced by the blows. of-

of "a number of flat springs, securedtogether.

. of sheave 3'. connection is formed be. tween sheave 3 and member '17, by means of.

a rod or a bolt 20, located in webs 21 of member 17,. one extending from each fork branch' of said member. Bolt passes through sheave 3 above'one of the arms 22 of said sheave, the arms being provided with a projection 23 adapted to'engage the bolt. On each ofthe arms of sheave 3 there is a similar projection in order to make possible the use of any one of said arms.v The arrangement is such, that when the left portion of the sheave moves in the falling directionof the hammer, the sheave will turn e shapeof independently of the hammer. On sheave 3' 2 there is fulcrumed on a pin 25 a strap 24,

' the middle portion of said strap as sho wnin Fig. 1 passing around one of the arms of sheave 3, preferably the one opposite tothe arm co-aoting with bolt '20. A connecting member26, secured to the machine frame 1 is connected to strap 24 by means of a pin 28,

located in, hooks 27 ofmember- 26 and normally resting in two recesses of strap 24. Said pin 28' isconnected to a spiral s ring 29, which is secured to the machine rame by means of a securing bolt 30, which may also serveto adjust the tension of spring 29. When turning the sheave in such a direction that the hammer will be raised by the coaction of arm 22 and bolt 20, the strap 24 will be forcedidownward from pin 28, which will remain supported by hooks 27.

A buffer is located below the spring shaft I p 16 of the hammer; Said bufiercomprises a support or base 31 mounted on a foundation plate or block 32. Said support is threaded on the inside and a socket 34 having an operating handle-or wheel 35 is'screwed into same. In this socket there is longitudinally movable a'rod 36, provided at its lower end with a'stop washer 38 and at the upper end with a buffer head 37 acted upon by a spring 39. Y a

The hammer head 40 is secured to spring arm 16 by means of four elastic members 41 made of rubber or any other suitable material; Of these elastic members 41, two are located at the upper side of the and the other two at the lower side; Cross pieces 42 of ironor the like are secured to arm 16 between the elastic members 41, the whole being introduced into a hole in the hammer, in the usual manner, and axially secured by means of two plates 43 and 44. The cross dimensions of the arm 16 and the hole in "the hammer-are alike. The hammer head is provided with a steel tool 45, which may be provided withan edge, as shown on the drawing, or may be made 0btuse or convex or any suitable shape. Below the hammer on foundaton block 32 there is mounted a steel anvil 46, which may be given difi'erent shapes in the same manner as steel tool 45. may be built up. of solid stone orreinitorced concrete or any other suitable material. It bein a matter of great importance that mem ers 45 and 46 are accurately adjusted with relation to each other, it is advisable to connect the machine frame to the foundation block 32 by means of girders 47.

On each side the hammer head 40 is provided with a guide 4:8,the guide on the fore side of the head not being shown on the drawing Fig. 1. i i

To make it possible to stop the hammer and retain it in different positions, a frictional pawlmay beprovided, said pawl acting on the sheave 3 and being titted with a hand operating gear of known design.

The machine is operated and brought into function by means of the treadle 14. The treadle being forced down, the friction sheave 4 will be brought into driving contact with .the larger sheave 3, the treadle pressure being transmitted by means of links 12. The sheave 4 rotating, the hammer will be raised during the rotation of sheave as long as sheavesi and 4 are in frictional connection with each other. According to the principle bearing on the; design of this machine, thehammer will be raised as long as thetreadle is held down. Afterwards, when thehammer falls and strikes a stone block placed on the lower steel anvil, the force of the hammer will be subdued by the action of the butler, and sheave 3, still under the influence of the, inertial force, will be checked by spring 29. The hammer be-. ing yieldingly connected to the arm 16, will thus be able to deliver its blow on the block with the least possible disturbance to the shaft, sheaveand other connections, said connections also being spared from the ac- The foundation block 32 tion of those powerful shocks which would occur if the hammer, the shaft and the sheave were rigidly connected toeach other. The buffer as well as the sprin 29 must be dimensioned in such a manner that the hammer will be raised quickly from the stone block owin to the tension of the spring 39, and that s1eave3 will be turned into its initial position for raising .the hammer. The buffer is vertically adjustable, in such a way that the arm 16 may be acted upon at the right moment, and not too early. Such an adjustment is also necessary on ac count of the wearing down oi the steel members 45 and 46. l p I Within the scope of theinvention, the de tails of the machine may be varied as to size,

:l'orm, arrangement and manner of using, without departing from the spirit of the invention as set forth inthe appended claims Having now described the nature of my invention, what I claim is:

1. In a stone splitting machine the combination of a hammer provided with an open: ing therethrough, a vertically movable spring arm having one end thereof extending into said opening, the arm being of the same width as that of: the opening but of considerably less thickness thanythe height of said opening, resilient membersbetween said arm and the top and bottom of said opening, and means for preventing withdrawal of said arm from the opening, said means comprising a pair of )lates secured to the hammer and closing the ends of the opening and a pair of metallic memberssecured to the arm between said resilient members.

2. A stonesplitting machine, comprising in combimition, an arm freely pivoted for angular movcment in a vertical plane, a hammer secured to said arm at one end thereof, rotatable means efl'ective during rotation in one direction to engage and raise said arm thereby to elevate the hammer, said means being adapted to release the arm thereby to permit the hammer to fall tree of its elevating means when the rotation thereof ceases, and a resilient buffer disposed in position to check the motion of said elevating means when the latter is rotating in the direction opposite to its hammerraising direction.

In testimony whereof I have signed my name to this specification.

CARL GUSTAF SMITH. 

